package com.gdut.educenter.controller;

import com.gdut.commonutils.JwtUtils;
import com.gdut.educenter.entity.UcenterMember;
import com.gdut.educenter.service.UcenterMemberService;
import com.gdut.educenter.utils.ConstantWxUtils;
import com.gdut.educenter.utils.HttpClientUtils;
import com.gdut.servicebase.exceptionhandler.GuliException;
import com.google.gson.Gson;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

/**
 * @author Drifiter
 * @create 2021-08-30 21:43
 */
@Controller //请求地址，不需要返回数据
@RequestMapping("/api/ucenter/wx")
//@CrossOrigin
public class WxApiController {

    @Autowired
    private UcenterMemberService memberService;

    //2获取扫描人信息，添加数据
    @GetMapping("callback")
    public String callback(String code, String state) {
        try {
            //1获取code值，临时票据，类似于验证码

            //2拿着code请求微信固定的地址，得到两个值accsess_token 和 openid
            //向认证服务器发送请求换取access_token
            String baseAccessTokenUrl =
                    "https://api.weixin.qq.com/sns/oauth2/access_token" +
                    "?appid=%s" +
                    "&secret=%s" +
                    "&code=%s" +
                    "&grant_type=authorization_code";

            //拼接三个参数: id秘钥和code值
            String accessTokenUrl = String.format(
                    baseAccessTokenUrl,
                    ConstantWxUtils.WX_OPEN_APP_ID,
                    ConstantWxUtils.WX_OPEN_APP_SECRET,
                    code
            );

            //请求这个拼接好的地址，得到返回两个值accsess_token和 openid
            //使用httpclient发送请求，得到返回结果
            String accessTokenInfo = HttpClientUtils.get(accessTokenUrl);
//            System.out.println("accessTokenInfo:"+accessTokenInfo);


            //从accessTokenInfo字符串获取出来两个值accsess_token 和 openid
            // 把accessTokenInfo字符串转换map集合，根据map里面key获取对应值
            // 使用json转换工具 Gson
            Gson gson = new Gson();
            HashMap mapAccessToken = gson.fromJson(accessTokenInfo, HashMap.class);
            String access_token = (String) mapAccessToken.get("access_token");
            String openid = (String) mapAccessToken.get("openid");



            //把扫描人信息添加数据库里面
            //判断数据表里面是否存在相同微信信息，根据openid判断
            UcenterMember member = memberService.getOpenIdMember(openid);
            if (member == null){


                //3拿着得到accsess_token 和 openid，再去请求徼信提供固定的地址，获取到扫描人信息
                //访问微信的资源服务器，获取用户信息
                String baseUserInfoUrl = "https://api.weixin.qq.com/sns/userinfo" +
                        "?access_token=%s" +
                        "&openid=%s";
                String userInfoUrl = String.format(
                        baseUserInfoUrl,
                        access_token,
                        openid
                );

                //发送请求
                String userInfo = HttpClientUtils.get(userInfoUrl);
//            System.out.println("userInfo:"+userInfo);
                HashMap userInfoMap = gson.fromJson(userInfo, HashMap.class);
                String nickname = (String) userInfoMap.get("nickname");   //昵称
                String headimgurl = (String) userInfoMap.get("headimgurl");    //头像

                member = new UcenterMember();
                member.setOpenid(openid);
                member.setNickname(nickname);
                member.setAvatar(headimgurl);
                memberService.save(member);
            }

            //使用jwt根据member对象生成token字符串
            String jwtToken = JwtUtils.getJwtToken(member.getId(), member.getNickname());


            //最后:返回首页面，通过路径传递token字符串
            return "redirect:http://localhost:3000?token="+jwtToken;



        } catch (Exception e) {
            throw new GuliException(20001,"登录失败");
        }



    }


    //1生成微信扫描二维码
    @GetMapping("/login")
    public String getWxCode() {

        // 微信开放平台授权baseUrl     %s相当于?代表占位符
        String baseUrl = "https://open.weixin.qq.com/connect/qrconnect" +
                "?appid=%s" +
                "&redirect_uri=%s" +
                "&response_type=code" +
                "&scope=snsapi_login" +
                "&state=%s" +
                "#wechat_redirect";

        String redirectUrl = ConstantWxUtils.WX_OPEN_REDIRECT_URL;
        try {
            redirectUrl = URLEncoder.encode(redirectUrl, "utf-8");
        } catch (Exception e) {
            e.printStackTrace();
        }


        String url = String.format(
                baseUrl,
                ConstantWxUtils.WX_OPEN_APP_ID,
                redirectUrl,
                "gdut"
        );


        return "redirect:" + url;
    }


}


